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A scintillator absorbs an incident flux of 5 MeV alpha particles that totals 10^6 particles/s The scintillation efficiency for the these particles is 3% and the average wavelength of the emitted ligt is 420nm. If the scintillator is coupled to a photodiode with an average quantum efficiency of 75% for the scintillation light and the light collection efficiency is 80%, estimate the expected signal from the photodiode when operated in current mode.
Two identical guitar strings are prepared such that they have the same length (2.43 m) and are under the same amount of tension. find the wave propagation speed on the guitar strings
The desperate contestants on a TV survival show are very hungry. The only food they can see is some fruit hanging on a branch high in a tree. With what speed does the rock leave the spring
A 3.65 kg particle is located on the x-axis at xm =?8 m, find the coordinate of the center of mass of this two-particle system
Which has a greater packing fraction, a diamond crystal structure or a copper crystal structure, how much empty space would be left in each structure
What is walking speed if the speed drops. after an exciting but exhausting lecture, a physic lecture stretch out for a nap on a bed of nails, suffering no injury and only moderate discomfort. how is this possible.
A mass m = 15 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.1, for a distance d = 5.1 m. What is the work done by gravity as it comes to rest
A sign weighing 400N is suspended at the end of a 350N uniform rod that is hinged at the wall. What is the tention T in support cable
A student (m = 56 kg) falls freely from rest and strikes the ground. All through the impact with the ground, he comes to rest in a time of 0.04 s.
An object is 32cm in front of a converging lens with a focal length of 6.9cm, Use ray tracing to determine the location of the image
A car is parked 21.0 m directly south of a railroad crossing. A train is approaching the crossing from the west, What frequency does the car's driver hear when the horn blast reaches the car
Blocks of 1.0, 2.0, and 3.0 kg are lined up on a frictionless table with a 12 N force applied to the leftmost block
The catapults on the USS George H.W. Bush can launch aircraft from rest to a speed of 150 mph over a distance of 270 feet. Find the acceleration of the aircraft
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